CN215728707U - Three-phase power supply phase loss detection circuit and motor controller of BLDC motor - Google Patents
Three-phase power supply phase loss detection circuit and motor controller of BLDC motor Download PDFInfo
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- CN215728707U CN215728707U CN202121216199.3U CN202121216199U CN215728707U CN 215728707 U CN215728707 U CN 215728707U CN 202121216199 U CN202121216199 U CN 202121216199U CN 215728707 U CN215728707 U CN 215728707U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a three-phase power supply open-phase detection circuit and a motor controller of a BLDC motor thereof, which comprise 3 paths of rectification circuits, a voltage reduction circuit and a comparison circuit, wherein the input ends of the 3 paths of rectification circuits are respectively connected with a three-phase input power supply U, V, W, the output ends of the 3 paths of rectification circuits are connected together to be used as the input end of the voltage reduction circuit, the output end of the voltage reduction circuit is connected to the input end of the comparison circuit, and the output end of the comparison circuit is used as a three-phase power supply open-phase signal output end.
Description
The technical field is as follows:
the utility model relates to a three-phase power supply open-phase detection circuit and a motor controller of a BLDC motor.
Background art:
in the industry, regarding a direct current three-phase motor, only the three-phase end open-phase protection of a motor part is usually considered, and the power end is not monitored by neglecting the three-phase input of a power supply part, so that when the power supply is in an open phase, a product cannot detect abnormality and continues to operate, and finally the product is damaged, and the reliability of the product is poor.
The utility model content is as follows:
the utility model aims to provide a three-phase power supply phase-lack detection circuit and a motor controller of a BLDC motor thereof, which can solve the technical problem that in the prior art, when a power supply phase-lack occurs, a product cannot detect abnormality and continues to operate, and finally the product is damaged.
The purpose of the utility model is realized by the following technical scheme.
The utility model aims to provide a three-phase power supply open-phase detection circuit, which is characterized in that: including 3 rectifier circuit, step-down circuit, comparison circuit of way, three-phase input power U, V, W is connected respectively to 3 rectifier circuit's input, and 3 rectifier circuit's output links together as step-down circuit's input, and step-down circuit's output is connected to comparison circuit's input, and comparison circuit's output is as three-phase power supply phase failure signal output.
The 1-path rectifying circuit consists of a diode and a current-limiting resistor.
The voltage reduction circuit is formed by connecting a resistor R4 and a resistor R5 in series, wherein one end of the resistor R4 and the resistor R5 are connected in series and then grounded, and the other end of the resistor R4 and the other end of the resistor R5 are connected with the output end of the rectifying circuit.
The comparison circuit comprises a comparator IC1, a voltage division resistor R6 and a voltage division resistor R7; after the resistor R6 and the resistor R7 are connected in series, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R7 is grounded GND, the middle point of the resistor R6 and the resistor R7 is a comparison reference voltage and serves as one input end of the comparator IC1, and the other comparison input end of the comparator IC1 is led out between the resistor R4 and the resistor R5.
A motor controller of a BLDC motor, characterized in that: including three-phase rectifier circuit, inverter circuit and microprocessor MCU, three-phase input power U, V, W is connected to three-phase rectifier circuit's input, three-phase rectifier circuit's output is connected to DC-DC conversion power supply circuit input, DC-DC conversion power supply circuit's output provides different supply voltage and supplies power for inverter circuit and microprocessor MCU, microprocessor MCU is according to the work of the parameter output control signal control inverter circuit of motor operation process, the stator coil winding of BLDC motor is connected to inverter circuit's output, its characterized in that: the three-phase power supply open-phase detection circuit is characterized in that the three-phase power supply open-phase detection circuit is the three-phase power supply open-phase detection circuit, the output end of the comparison circuit is connected with the input end of the microprocessor MCU, the microprocessor MCU judges whether open-phase exists or not according to the output signal of the comparison circuit, and if the open-phase exists, the microprocessor MCU controls the inverter circuit to stop the machine.
Compared with the prior art, the utility model has the following effects:
1) a three-phase power supply phase loss detection circuit is characterized in that: including 3 rectifier circuit ways, the step-down circuit, comparison circuit, three-phase input power U, V, W is connected respectively to 3 rectifier circuit's input, 3 rectifier circuit's output links together as step-down circuit's input, step-down circuit's output is connected to comparison circuit's input, comparison circuit's output lacks looks signal output as three-phase power, when detecting that input power appears lacking looks, can make the shutdown operation at once, protection components and parts, improve circuit's stability and reliability, circuit structure is simple.
2) Other advantages of the present invention are described in detail in the examples section.
Description of the drawings:
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention;
fig. 3 is a waveform diagram of a three-phase input power U, V, W without phase loss according to an embodiment of the present invention;
fig. 4 is a waveform diagram of a three-phase input power U, V, W under a phase-loss condition according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 to 4, the present embodiment provides a three-phase power supply phase-loss detection circuit, which is characterized in that: including 3 rectifier circuit ways, the step-down circuit, comparison circuit, three-phase input power U, V, W is connected respectively to 3 rectifier circuit's input, 3 rectifier circuit's output links together as step-down circuit's input, step-down circuit's output is connected to comparison circuit's input, comparison circuit's output lacks looks signal output as three-phase power, when detecting that input power appears lacking looks, can make the shutdown operation at once, protection components and parts, improve circuit's stability and reliability, circuit structure is simple.
When the three-phase input power U, V, W is in a condition of no phase loss, the waveform condition of the port at the output terminal of the comparator is distributed on the limit line, as shown in fig. 3.
When the three-phase input power U, V, W is in the phase-loss condition, the waveform condition of the port at the comparator output is distributed between the limit lines, as shown in fig. 4.
The 1-path rectifying circuit consists of a diode and a current-limiting resistor; the first circuit of the rectifying circuit consists of a diode D1 and a current-limiting resistor R1; the second circuit of the rectifying circuit consists of a diode D2 and a current-limiting resistor R2; the third circuit of the rectifying circuit consists of a diode D3 and a current-limiting resistor R3.
The voltage reduction circuit is formed by connecting a resistor R4 and a resistor R5 in series, wherein one end of the resistor R4 and the resistor R5 are connected with the ground after being connected in series, and the other end of the resistor R4 and the resistor R5 are connected with the output end of the rectification circuit.
The comparison circuit comprises a comparator IC1, a voltage-dividing resistor R6 and a voltage-dividing resistor R7; after the resistor R6 and the resistor R7 are connected in series, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R7 is grounded GND, the middle point of the resistor R6 and the resistor R7 is a comparison reference voltage and serves as one input end of the comparator IC1, and the other comparison input end of the comparator IC1 is led out between the resistor R4 and the resistor R5.
Example two:
as shown in fig. 5, a motor controller of a BLDC motor is characterized in that: including three-phase rectifier circuit, inverter circuit and microprocessor MCU, three-phase input power U, V, W is connected to three-phase rectifier circuit's input, three-phase rectifier circuit's output is connected to DC-DC conversion power supply circuit input, DC-DC conversion power supply circuit's output provides different supply voltage and supplies power for inverter circuit and microprocessor MCU, microprocessor MCU is according to the work of the parameter output control signal control inverter circuit of motor operation process, the stator coil winding of BLDC motor is connected to inverter circuit's output, its characterized in that: the three-phase power supply open-phase detection circuit is the three-phase power supply open-phase detection circuit in the first embodiment, the output end of the comparison circuit is connected with the input end of the microprocessor MCU, the microprocessor MCU judges whether open-phase exists according to the output signal of the comparison circuit, if the open-phase exists, the microprocessor MCU controls the inverter circuit to stop operating, components and parts are protected, the stability and reliability of the circuit are improved, and the circuit structure is simple.
The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.
Claims (5)
1. A three-phase power supply phase loss detection circuit is characterized in that: including 3 rectifier circuit, step-down circuit, comparison circuit of way, three-phase input power U, V, W is connected respectively to 3 rectifier circuit's input, and 3 rectifier circuit's output links together as step-down circuit's input, and step-down circuit's output is connected to comparison circuit's input, and comparison circuit's output is as three-phase power supply phase failure signal output.
2. The open-phase detection circuit for three-phase power supply of claim 1, wherein: the 1-path rectifying circuit consists of a diode and a current-limiting resistor.
3. A three-phase power supply phase-loss detection circuit as claimed in claim 1 or 2, wherein: the voltage reduction circuit is formed by connecting a resistor R4 and a resistor R5 in series, wherein one end of the resistor R4 and the resistor R5 are connected with the ground after being connected in series, and the other end of the resistor R4 and the resistor R5 are connected with the output end of the rectification circuit.
4. A three-phase power supply phase-loss detection circuit as claimed in claim 3, wherein: the comparison circuit comprises a comparator IC1, a voltage division resistor R6 and a voltage division resistor R7; after the resistor R6 and the resistor R7 are connected in series, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R7 is grounded GND, the middle point of the resistor R6 and the resistor R7 is a comparison reference voltage and serves as one input end of the comparator IC1, and the other comparison input end of the comparator IC1 is led out between the resistor R4 and the resistor R5.
5. A motor controller of a BLDC motor, characterized in that: including three-phase rectifier circuit, inverter circuit and microprocessor MCU, three-phase input power U, V, W is connected to three-phase rectifier circuit's input, three-phase rectifier circuit's output is connected to DC-DC conversion power supply circuit input, DC-DC conversion power supply circuit's output provides different supply voltage and supplies power for inverter circuit and microprocessor MCU, microprocessor MCU is according to the work of the parameter output control signal control inverter circuit of motor operation process, the stator coil winding of BLDC motor is connected to inverter circuit's output, its characterized in that: the three-phase power supply open-phase detection circuit is the three-phase power supply open-phase detection circuit in any one of claims 1 to 4, the output end of the comparison circuit is connected with the input end of the microprocessor MCU, the microprocessor MCU judges whether the open-phase is generated according to the output signal of the comparison circuit, and if the open-phase is generated, the microprocessor MCU controls the inverter circuit to stop the machine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121216199.3U CN215728707U (en) | 2021-06-02 | 2021-06-02 | Three-phase power supply phase loss detection circuit and motor controller of BLDC motor |
| PCT/CN2021/115565 WO2022252417A1 (en) | 2021-06-02 | 2021-08-31 | Phase loss detection circuit for three-phase power source, and electric motor controller for bldc electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121216199.3U CN215728707U (en) | 2021-06-02 | 2021-06-02 | Three-phase power supply phase loss detection circuit and motor controller of BLDC motor |
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| Publication Number | Publication Date |
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| CN215728707U true CN215728707U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121216199.3U Active CN215728707U (en) | 2021-06-02 | 2021-06-02 | Three-phase power supply phase loss detection circuit and motor controller of BLDC motor |
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| Country | Link |
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| CN (1) | CN215728707U (en) |
| WO (1) | WO2022252417A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114498907A (en) * | 2022-04-08 | 2022-05-13 | 中山大洋电机股份有限公司 | Direct-current brushless motor used for dual-power-supply electrical equipment and control method |
| CN114720785A (en) * | 2022-06-13 | 2022-07-08 | 中山大洋电机股份有限公司 | Motor with three-phase power supply open-phase detection function and power supply open-phase detection method |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
| CN115792419A (en) * | 2023-02-13 | 2023-03-14 | 中山大洋电机股份有限公司 | Three-phase power supply phase loss detection circuit and BLDC motor controller |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117977500B (en) * | 2024-02-02 | 2024-09-27 | 江苏神州半导体科技有限公司 | Three-phase soft start and fall protection topological structure |
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| JPH0568327A (en) * | 1991-09-06 | 1993-03-19 | Matsushita Seiko Co Ltd | Open-phase detection circuit for three-phase power source |
| JP2004135392A (en) * | 2002-10-08 | 2004-04-30 | Tamagawa Seiki Co Ltd | Three-phase power supply phase interruption detecting apparatus |
| CN2591825Y (en) * | 2002-12-30 | 2003-12-10 | 李乾良 | Phase-defect break zero electricity leakage protector |
| CN101799520B (en) * | 2010-01-27 | 2011-12-07 | 付爱喜 | Open-phase detection method and detection circuit for three-phase power source |
| CN202111456U (en) * | 2011-05-30 | 2012-01-11 | 唐山松下产业机器有限公司 | Open-phase detection protection circuit |
| CN103454505B (en) * | 2013-08-31 | 2016-06-08 | 中国煤炭科工集团太原研究院 | Based on open phase detection method and the circuit of harmonic detecting |
| CN110161325B (en) * | 2018-02-14 | 2022-04-19 | 台达电子工业股份有限公司 | Voltage detection circuit |
| CN208350969U (en) * | 2018-06-25 | 2019-01-08 | 雄县康德控制技术有限公司 | A kind of detection circuit and frequency converter |
| JP2020180787A (en) * | 2019-04-23 | 2020-11-05 | 日本電波工業株式会社 | Detection device and power supply |
| CN210243751U (en) * | 2019-04-30 | 2020-04-03 | 湖北三江航天万峰科技发展有限公司 | AC three-phase power phase loss detection device |
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2021
- 2021-06-02 CN CN202121216199.3U patent/CN215728707U/en active Active
- 2021-08-31 WO PCT/CN2021/115565 patent/WO2022252417A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498907A (en) * | 2022-04-08 | 2022-05-13 | 中山大洋电机股份有限公司 | Direct-current brushless motor used for dual-power-supply electrical equipment and control method |
| CN114720785A (en) * | 2022-06-13 | 2022-07-08 | 中山大洋电机股份有限公司 | Motor with three-phase power supply open-phase detection function and power supply open-phase detection method |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
| CN115207880B (en) * | 2022-08-09 | 2023-12-19 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
| CN115792419A (en) * | 2023-02-13 | 2023-03-14 | 中山大洋电机股份有限公司 | Three-phase power supply phase loss detection circuit and BLDC motor controller |
| WO2024169147A1 (en) * | 2023-02-13 | 2024-08-22 | 中山大洋电机股份有限公司 | Three-phase power supply phase loss detection circuit and bldc motor controller |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022252417A1 (en) | 2022-12-08 |
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